Dude obsesses over the name of a product rather than an individual expression of art. His mind has been warped into the pinnacle of consumerism. As long as some other product exists carrying the name of another product he's consumed, he must consume that as well. The idea of just avoiding it when he knows he won't like it is alient to him. The product name has been tarnished to him and in turn so has the original.
Think of the Star Wars fans that have completely falled down the abyss of mindlessness. They'll fucking buy anything. Coffee mugs, figurines, dildos, just about anything as long as it's got the Star Wars branding on it. To them it is no longer about any individual movie/s that they felt a connection to, their mind is at that point consumed entirely by a brand name, and once the brand name is devalued by a certain amount of products, they turn a cynical eye towards the entire brand.
You have a similar mindset with people who obess over what is "canon" in a franchise. They're incapable of taking one separate season/part as an individual story of fiction without it being "ruined" by a shitty sequel, no matter how good the first story was it becomes retroactively bad to them if the story that came after is bad.
This isn't "a little autistic", these people are straight up mentally diseased.